Alert archive / Louisiana / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 461, NWS Shreveport, LA

December 9, 20085 parishes in Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Dec 9, 2008, 3:45 PM CST for 5 parishes in Louisiana. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Dec 9, 2008, 3:45 PM CST (21:45 UTC)
Expired: Dec 9, 2008, 4:15 PM CST
In force: 30 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

Counties Caldwell Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Winn Parish, LA

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Dec 9, 9:32 AM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 9.8 hours before the alert went out and 141 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1607 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 569 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 282 m²/s²
0-3 km storm-relative helicity: 295 m²/s²
Significant tornado parameter: 2.5
Supercell composite: 13.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Shreveport, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Dec 9, 3:30 PM CST, 15 minutes earlier.

Area forecast discussion, Dec 9, 3:30 PM CST, 15 minutes before

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Hazardous weather outlook, Dec 9, 12:00 PM CST, 3 hours 45 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SHREVEPORT LA
1200 PM CST TUE DEC 9 2008

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-TXZ096-
097-108>112-124>126-136>138-149>153-165>167-101200-
ANGELINA-BIENVILLE-BOSSIER-BOWIE-CADDO-CALDWELL-CAMP-CASS-CHEROKEE-
CLAIBORNE-COLUMBIA-DE SOTO-FRANKLIN-GRANT-GREGG-HARRISON-HEMPSTEAD-
HOWARD-JACKSON-LA SALLE-LAFAYETTE-LINCOLN-LITTLE RIVER-MARION-
MCCURTAIN-MILLER-MORRIS-NACOGDOCHES-NATCHITOCHES-NEVADA-OUACHITA-
PANOLA-RED RIVER LA-RED RIVER TX-RUSK-SABINE LA-SABINE TX-
SAN AUGUSTINE-SEVIER-SHELBY-SMITH-TITUS-UNION AR-UNION LA-UPSHUR-
WEBSTER-WINN-WOOD-
1200 PM CST TUE DEC 9 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST OKLAHOMA...SOUTHWEST
ARKANSAS...NORTHEAST TEXAS...AND FOR NORTHWEST AND NORTH CENTRAL
LOUISIANA.

.DAY ONE...TODAY AND TONIGHT...

SCATTERED TO NUMEROUS THUNDERSTORMS ARE EXPECTED TO MOVE
ACROSS THE FOUR STATE REGION TODAY...ENDING FROM WEST TO
EAST TONIGHT. SOME OF THE THUNDERSTORMS WILL BECOME SEVERE...
PRODUCING LARGE HAIL...DAMAGING WINDS...AND DEADLY LIGHTNING.
A FEW STORMS WILL ALSO HAVE THE POTENTIAL TO PRODUCE TORNADOES.
IN ADDITION...LOCALLY HEAVY RAINFALL THROUGHOUT THE AFTERNOON
COULD LEAD TO FLASH FLOODING...ESPECIALLY IN URBAN AREAS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...

NO HAZARDOUS WEATHER EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND
EMERGENCY MANAGEMENT OFFICIALS WILL BE NEEDED TODAY AND TONIGHT.

In the hours before

Special weather statement, Dec 9, 12:09 PM CST, 3 hours 36 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1209 PM CST TUE DEC 9 2008

ARZ073-LAZ005-006-014-091900-
LINCOLN-OUACHITA-UNION-
1209 PM CST TUE DEC 9 2008

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A SIGNIFICANT
WEATHER ALERT...EFFECTIVE UNTIL 100 PM CST...FOR THE FOLLOWING
COUNTIES AND PARISHES...

IN SOUTH CENTRAL ARKANSAS...
     UNION...
IN NORTH CENTRAL LOUISIANA...
     UNION...LINCOLN AND OUACHITA...

INCLUDING THE FOLLOWING LOCATIONS...
     HUTTIG...LAPILE...LAWSON...STRONG...URBANA...BERNICE AND
     FARMERVILLE...

AT 1206 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A LINE OF STRONG THUNDERSTORMS STRETCHING FROM EASTERN UNION COUNTY
ARKANSAS...TO NORTHERN LINCOLN PARISH IN LOUISIANA...MOVING NORTHEAST
AT 45 MPH.

SMALL HAIL...AND WINDS 40 TO 50 MPH ARE EXPECTED WITH THESE STORMS. IF
THIS LINE OF STORMS INTENSIFIES FURTHER...A SEVERE THUNDERSTORM
WARNING MAY BE ISSUED.

LAT...LON 3272 9206 3261 9276 3276 9273 3276 9272
      3309 9268 3330 9245 3328 9239 3330 9233
      3327 9230 3327 9222 3321 9220 3322 9217
      3317 9215 3316 9209 3310 9212 3302 9206
      3286 9207 3274 9204
TIME...MOT...LOC 1809Z 241DEG 40KT 3294 9258

18

Local storm report, Dec 9, 12:53 PM CST, 2 hours 52 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1253 PM CST TUE DEC 09 2008

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1225 PM     TSTM WND DMG     4 NW JENA               31.73N 92.17W
12/09/2008                   LA SALLE           LA   LAW ENFORCEMENT

            ALONG HWY 127...TRAILERS DAMAGED IN SUMMERFIELD.

&&

STEVENS

Local storm report, Dec 9, 12:55 PM CST, 2 hours 50 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE SHREVEPORT LA
1255 PM CST TUE DEC 09 2008

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1045 AM     TSTM WND DMG     4 W DIXIE INN           32.59N 93.40W
12/09/2008                   WEBSTER            LA   LAW ENFORCEMENT

            DAMAGE REPORTED ON GOODWILLE RD, SAVANNA LN AND FULLER
            ROAD. AROUND 30 TREES DOWN AND SEVERAL HOMES DAMAGED.SOME
            HOMES HAVE ROOF DAMAGE.

&&

STEVENS

Special weather statement, Dec 9, 12:58 PM CST, 2 hours 47 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1258 PM CST TUE DEC 9 2008

LAZ005-006-014-092000-
LINCOLN-OUACHITA-UNION-
1258 PM CST TUE DEC 9 2008

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A SIGNIFICANT
WEATHER ALERT...EFFECTIVE UNTIL 200 PM CST...FOR THE FOLLOWING
PARISHES...

IN NORTH CENTRAL LOUISIANA...
     UNION...LINCOLN AND OUACHITA...

INCLUDING THE FOLLOWING LOCATIONS...
     CLAIBORNE...FARMERVILLE...RUSTON...STERLINGTON AND WEST
     MONROE...

AT 1254 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A LINE OF STRONG THUNDERSTORMS STRETCHING FROM CENTRAL UNION PARISH...
INTO EASTERN LINCOLN PARISH...MOVING EAST NORTHEAST AT 30 MPH.

SMALL HAIL...WINDS 40 TO 50 MPH...AND EXTENDED PERIODS OF HEAVY RAIN
ARE EXPECTED WITH THIS LINE OF STORMS. IF THESE STORMS INTENSIFY
FURTHER...A SEVERE THUNDERSTORM WARNING MAY BE REQUIRED.

LAT...LON 3251 9211 3250 9268 3301 9243 3300 9206
      3298 9207 3294 9205 3292 9207 3286 9207
      3280 9204 3274 9204 3273 9206 3271 9204
      3272 9200
TIME...MOT...LOC 1858Z 238DEG 27KT 3274 9246

18

Special weather statement, Dec 9, 1:34 PM CST, 2 hours 11 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
134 PM CST TUE DEC 9 2008

LAZ018-019-092030-
NATCHITOCHES-WINN-
134 PM CST TUE DEC 9 2008

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A SIGNIFICANT
WEATHER ALERT...EFFECTIVE UNTIL 230 PM CST...FOR THE FOLLOWING
PARISHES...

IN NORTHWEST LOUISIANA...
     NATCHITOCHES...
IN NORTH CENTRAL LOUISIANA...
     WINN...

INCLUDING THE FOLLOWING LOCATIONS...
     CAMPTI AND NATCHITOCHES...

AT 132 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR NATCHITOCHES...MOVING NORTHEAST AT 45 MPH. RADAR
INDICATES WEAK TO MODERATE ROTATION ASSOCIATED WITH THIS STORM.

SMALL HAIL...AND WINDS 40 TO 50 MPH ARE EXPECTED WITH THIS STORM. IF THIS
STORM INTENSIFIES FURTHER...A WARNING MAY BE REQUIRED.

LAT...LON 3206 9302 3195 9281 3172 9308 3180 9319
TIME...MOT...LOC 1934Z 216DEG 38KT 3178 9311

18

Special weather statement, Dec 9, 2:22 PM CST, 1 hour 23 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
222 PM CST TUE DEC 9 2008

LAZ013-092045-
JACKSON-
222 PM CST TUE DEC 9 2008

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A SIGNIFICANT
WEATHER ALERT...EFFECTIVE UNTIL 245 PM CST...FOR THE FOLLOWING
PARISH...

IN NORTH CENTRAL LOUISIANA...
     JACKSON...

INCLUDING THE FOLLOWING LOCATIONS...
     CHATHAM...EROS AND INDIAN VILLAGE...

AT 219 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 13 MILES EAST OF JONESBORO...MOVING NORTHEAST AT
35 MPH.

SMALL HAIL...WINDS AROUND 50 MPH...AND VERY HEAVY RAIN ARE EXPECTED WITH
THIS STORM. IF THIS STORM INTENSIFIES FURTHER...A SEVERE THUNDERSTORM
WARNING MAY BE REQUIRED.

LAT...LON 3216 9231 3215 9236 3215 9263 3216 9264
      3249 9241 3248 9241 3241 9241 3232 9230
TIME...MOT...LOC 2022Z 223DEG 32KT 3220 9247

18

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 9, 4:35 AM CST	Tornado Warning	SHV	Panola	25 min
Dec 9, 7:14 AM CST	Severe Thunderstorm Warning	SHV	Cherokee, Smith	46 min
Dec 9, 8:51 AM CST	Special Weather Statement	SHV	Harrison	24 min
Dec 9, 9:18 AM CST	Special Weather Statement	SHV	Panola	42 min
Dec 9, 4:59 AM CST	Severe Thunderstorm Warning	SHV	Bossier, Caddo, De Soto	46 min
Dec 9, 5:04 AM CST	Tornado Warning	SHV	Bossier, Caddo, De Soto, Webster	41 min
Dec 9, 5:51 AM CST	Tornado Warning	SHV	De Soto, Red River	39 min
Dec 9, 6:19 AM CST	Tornado Warning	SHV	Bienville, Bossier, De Soto, Red River, Webster	56 min
Dec 9, 9:28 AM CST	Severe Thunderstorm Warning	SHV	Caldwell, Winn	32 min
Dec 9, 10:27 AM CST	Special Weather Statement	SHV	Bossier, Claiborne, Webster	63 min
Dec 9, 11:08 AM CST	Severe Thunderstorm Warning	SHV	Grant, LaSalle	37 min
Dec 9, 11:20 AM CST	Severe Thunderstorm Warning	SHV	Bienville, Claiborne, Lincoln, Union, Webster	40 min
Dec 9, 11:33 AM CST	Tornado Warning	SHV	Grant, LaSalle	42 min
Dec 9, 12:09 PM CST	Special Weather Statement	SHV	Union	51 min
Dec 9, 12:17 PM CST	Tornado Warning	SHV	Caldwell, LaSalle	28 min
Dec 9, 12:19 PM CST	Tornado Warning	SHV	Natchitoches, Sabine	41 min
Dec 9, 12:45 PM CST	Tornado Warning	SHV	Caldwell, LaSalle	30 min
Dec 9, 12:58 PM CST	Special Weather Statement	SHV	Union	62 min
Dec 9, 1:19 PM CST	Tornado Warning	SHV	Natchitoches, Sabine	41 min
Dec 9, 1:34 PM CST	Special Weather Statement	SHV	Natchitoches	56 min
Dec 9, 1:40 PM CST	Tornado Warning	SHV	Natchitoches, Winn	35 min
Dec 9, 1:57 PM CST	Tornado Warning	SHV	Grant, Natchitoches, Winn	36 min
Dec 9, 2:22 PM CST	Special Weather Statement	SHV	Jackson	23 min
Dec 9, 2:27 PM CST	Severe Thunderstorm Warning	SHV	Natchitoches, Winn	20 min
Dec 9, 3:08 PM CST	Tornado Warning	SHV	Caldwell, Winn	37 min
Dec 9, 4:20 PM CST	Special Weather Statement	SHV	Caldwell, Grant, LaSalle	55 min
Dec 9, 5:34 PM CST	Areal Flood Advisory	SHV	Ouachita	56 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2008 Every severe thunderstorm warning in 2008

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.